private void button_Receive_Data_Click(object sender, EventArgs e)
{
groupBox_Serial_Transmit.Enabled = false;
string Port_Name = comboBox_Available_SerialPorts.SelectedItem.ToString();
int Baud_Rate = Convert.ToInt32(comboBox_Standard_Baudrate.SelectedItem);
string ReceivedData = "";
SerialPort COMport = new SerialPort(Port_Name, Baud_Rate);
COMport.ReadTimeout = 3500;
try
{
COMport.Open();
}
catch (UnauthorizedAccessException SerialException)
{
MessageBox.Show(SerialException.ToString());
textBox_System_Log.Text = Port_Name + Environment.NewLine + Baud_Rate;
textBox_System_Log.Text = textBox_System_Log.Text + Environment.NewLine + SerialException.ToString();
COMport.Close();
}
catch (System.IO.IOException SerialException)
{
MessageBox.Show(SerialException.ToString());
textBox_System_Log.Text = Port_Name + Environment.NewLine + Baud_Rate;
textBox_System_Log.Text = textBox_System_Log.Text + Environment.NewLine + SerialException.ToString();
COMport.Close();
}
catch (InvalidOperationException SerialException)
{
MessageBox.Show(SerialException.ToString());
textBox_System_Log.Text = Port_Name + Environment.NewLine + Baud_Rate;
textBox_System_Log.Text = textBox_System_Log.Text + Environment.NewLine + SerialException.ToString();
COMport.Close();
}
catch
{
MessageBox.Show("ERROR in Opening Serial PORT -- UnKnown ERROR");
COMport.Close();
}
try
{
if (COMport.IsOpen == true)
{
textBox_System_Log.Text = Port_Name + Environment.NewLine + Baud_Rate;
ReceivedData = COMport.ReadLine();
textBox_System_Log.Text = textBox_System_Log.Text + Environment.NewLine + Environment.NewLine + "Waiting for Data";
textBox_Receive_Data.Text = ReceivedData;
COMport.Close();
textBox_System_Log.Text = textBox_System_Log.Text + Environment.NewLine + ReceivedData + " Received from Port";
groupBox_Serial_Transmit.Enabled = true;
}
else
{
groupBox_Serial_Transmit.Enabled = true;
MessageBox.Show("Unable to Write to COM port ");
groupBox_Serial_Transmit.Enabled = true;
COMport.Close();
}
}
catch (TimeoutException SerialTimeOutException)
{
MessageBox.Show(COMport.ReadTimeout.ToString() + " milliSeconds Passed" + Environment.NewLine + "Operation Timed Out");
MessageBox.Show(SerialTimeOutException.ToString());
textBox_System_Log.Text = COMport.ReadTimeout.ToString() + " milliSeconds Passed" + Environment.NewLine + "Operation Timed Out";
textBox_System_Log.Text = textBox_System_Log.Text + Environment.NewLine + SerialTimeOutException.ToString();
COMport.Close();
groupBox_Serial_Transmit.Enabled = true;
}
}
//Used for Receiving Data from Serial Port
private void Button_Receive_Data_Click(object sender, EventArgs e)
{
GroupBox_Serial_Transmit.Enabled = false; // Disable the Transmit Groupbox
#region
//Local Variables
string Port_Name = ComboBox_Available_SerialPorts.SelectedItem.ToString(); // PortName
int Baud_Rate = Convert.ToInt32(ComboBox_Standard_Baudrates.SelectedItem); // BaudRate
string ReceivedData = ""; // // String Containing Received Data
SerialPort COMport = new SerialPort(Port_Name, Baud_Rate);
#endregion
COMport.ReadTimeout = 3500; //Setting ReadTimeout =3500 ms or 3.5 seconds
//Open the Serial Port
#region
try
{
COMport.Open();
}
catch (UnauthorizedAccessException SerialException) //exception that is thrown when the operating system denies access
{
MessageBox.Show(SerialException.ToString());
TextBox_System_Log.Text = Port_Name + Environment.NewLine + Baud_Rate;
TextBox_System_Log.Text = TextBox_System_Log.Text + Environment.NewLine + SerialException.ToString();
COMport.Close(); // Close the Port
}
catch (System.IO.IOException SerialException) // An attempt to set the state of the underlying port failed
{
MessageBox.Show(SerialException.ToString());
TextBox_System_Log.Text = Port_Name + Environment.NewLine + Baud_Rate;
TextBox_System_Log.Text = TextBox_System_Log.Text + Environment.NewLine + SerialException.ToString();
COMport.Close(); // Close the Port
}
catch (InvalidOperationException SerialException) // The specified port on the current instance of the SerialPort is already open
{
MessageBox.Show(SerialException.ToString());
TextBox_System_Log.Text = Port_Name + Environment.NewLine + Baud_Rate;
TextBox_System_Log.Text = TextBox_System_Log.Text + Environment.NewLine + SerialException.ToString();
COMport.Close(); // Close the Port
}
catch //Any other ERROR
{
MessageBox.Show("ERROR in Opening Serial PORT -- UnKnown ERROR");
COMport.Close(); // Close the Port
}
#endregion
try
{
//If we are able to open the port
if (COMport.IsOpen == true)
{
//MessageBox.Show("Port Opened");
TextBox_System_Log.Text = Port_Name + Environment.NewLine + Baud_Rate;
ReceivedData = COMport.ReadLine(); // Wait for data reception
#region
TextBox_System_Log.Text = TextBox_System_Log.Text + Environment.NewLine + Environment.NewLine + "Waiting for Data";
TextBox_received_Data.Text = ReceivedData;
COMport.Close(); // Close the Port
TextBox_System_Log.Text = TextBox_System_Log.Text + Environment.NewLine + ReceivedData + " Received from Port";
#endregion
GroupBox_Serial_Transmit.Enabled = true; // Enable the Transmit Groupbox
}
else
{
GroupBox_Serial_Transmit.Enabled = true; // Enable the Transmit Groupbox
MessageBox.Show("Unable to Write to COM port ");
GroupBox_Serial_Transmit.Enabled = true; // Enable the Transmit Groupbox
COMport.Close(); // Close the Port
}
}
// Only catch timeout exceptions.
catch (TimeoutException SerialTimeOutException)
{
#region
// Show in a Message Box
MessageBox.Show(COMport.ReadTimeout.ToString() + " milliSeconds Passed" + Environment.NewLine + "Operation Timed Out");
MessageBox.Show(SerialTimeOutException.ToString());
//Show in Log TextBox
TextBox_System_Log.Text = COMport.ReadTimeout.ToString() + " milliSeconds Passed" + Environment.NewLine + "Operation Timed Out";
TextBox_System_Log.Text = TextBox_System_Log.Text + Environment.NewLine + SerialTimeOutException.ToString();
#endregion
COMport.Close(); // Close the Port
GroupBox_Serial_Transmit.Enabled = true; // Enable the Transmit Groupbox
}
}
